Propeller for marine vessels.



'PATENTED APR. 17, 1906.

L. D. MALLORY. PROPELLER FOR MARINE VESSELS.

APPLICATION FILED MAY 4, 1905.

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No. 817,981. PATENTED APR. 17, 1906. L. I). MALLORY.

PROPELLER FOR MARINE VESSELS.

APPLICATION FILED MAY4, 1905.

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LORENZO D. MALLORY, OF LONGBEAOH, CALIFORNIA.

PROPELLER FOR MARINE VESSELS- Specification of Letters Patent.

Patented April 17, 1906.

To all whom it may concern.-

Be it known that I, LORENZO Dow MAL- LORY,- a citizen of the United States, and a resident of Longbeach, in the county of Los Angeles and State of California, have invented a new and Improved Propeller for Marine Vessels, of which the following is a full, clear, and exact description.

This invention relates to screw-propellers for marine vessels; and it consists, substantially, in the construction and combinations of parts hereinafter particularly described,

and pointed out in the claims.

One of the principal objects of the invention is to provide means whereby boats and other similar vessels may be advantageously propelled by manual power, and also to overcome numerous disadvantages and obj ections which have been found to exist with many structures hitherto devised with like ends in-view.

A further object is to provide propelling devices for marine vessels which are simple in their embodiment and thoroughly effective and reliable in operation, besides possessing the capacity for long and repeated service.

The above and additional objects are attained by means substantially such as are illustrated in the accompanying drawings, forming a part of this specification, and in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a view in perspective (partly broken out) of a boat having my improvements embodied in connection therewith. Fig. 2 is an enlarged top plan view of the improvements. F ig. 3 is a view in side elevation of the propelling devices, indicating in dotted lines the manner in which the same are operated. Fig. 4 is an enlarged vertical sectional view taken on the line 4 4 of Fig. 3, and Fig. 5 is a sectional view in detail to indicate the construction and organization of certain parts more clearly.

Before proceeding with a more detailed description it may be stated that in the form of my improvements herein shown I employ a speciallyconstructed supporting-frame for the several operative elements or parts, in which is mounted a right and left hand screwshaft, through the medium of which the pro- 7 ulsion of the boat or other vessel is effected.

also employ reciprocatory devices of special construction for imparting rotary motion to the screw-shaft in either direction, said screw-shaft having coupled relation with the propeller-shaft of the boat or other vessel to be propelled. Special means are also employed for manually operating the reciprocatory devices, as well as special means for steering the vessel, and while I have herein represented my improvements in a certain preferred embodiment it will be understood that I do not limit myself thereto in precise detail, since immaterial changes therein may be resorted to coming within the scope of my invention.

Reference being had to the several parts by the designating characters marked thereon, 1 represents a boat or similar vessel in which my improvements are installed to propel the same, said improvements being suitably mounted in a supporting-frame therefor comprising the rearward-inclined cast-metal truss 2, the tie-beam 3 of which is secured to a baseblock 4 within the boat or vessel, and the u wardly-extending rearwardly and inward y inclined side members 5 of which are integral with the parallel horizontal members 6, the rearward terminal portions 7 of which extend rearwardly and downwardly, and between which is secured the extended apex member 8 of the rearward-inclined truss 9 by means of bolts 10, the lower ends of the side members 11 of which truss are integral with the tie beam 12 therefor, which has suitable support,

in the bottom or other part of the boat or other vessel 1. Said parallel members 6 are also secured together by one or more bolts 13 at the place of intersection thereof with the upper ends of the truss members.

The tie-beam 3 of the forward truss 2 has secured thereto by bolts 14 a bearing 15 for the forward journal of the main shaft 16, which is a right and left hand screw-shaft, the rearward journal whereof works through another bearing 17, supported by the tie-beam 12 of the rearward truss and is coupled at 18 to the shaft 19 of the propeller 20 of the boat. (See Fig. 1.)

Working on the screw-shaft 16 are right and left hand nuts 21 and 22, each having inner diametrically opposite lugs 23, adapted to one of the spiral grooves 24', formed in the screw-shaft and each being formed circumferentially with ratchet-teeth 25, separated by ample spaces 26 to receive the ends of locking-pawls presently referred to. Inclosing said ratchet-nuts 21 and 22 and having reciprocatory motion on the screw-shaft 16 is a casing 27, provided with openings 28 in the end walls 29 thereof, through which said screw-shaft extends, the outer ends of the bodies of the ratchet-nuts having abutting engagement with said end walls at 30. (See Fig. 3.) The said casing is provided with internally-threaded lateral extensions 31, to which is secured by means of headed threaded bolts 32 and washers 33 the ends of an arched yoke 34, surmounted by a threaded upward extension 35, in which is fitted the threaded lower end of a rod 36, the upper portion of which has reciprocating movement through a vertical opening therefor in an oscillatory block 37, pivoted at 38 between the parallel members 6 of the supporting-frame for the structure.

Supported lengthwise of the casing 27 by means of bearings 39, fitted in the top thereof, is a pin or bolt 40, on which is mounted adjacent to each of said bearings the hub of a double locking-pawl 41, the members 42 of which work through openings 43 therefor in the top of the casing for effecting interlocking engagement with the teeth of one of the ratchet-nuts. (See Fig. 4.) Each of said double pawls 41 is controlled and set by means of an approximately triangular spring 44, coiled about the pin or bolt 40, as shown, the terminals of the free members 45 of said springs engaging the double pawls in such manner as to hold them into whatever position they may be thrown by actuation of the spring itself through the medium of a hand-lever 45 mounted on the bolt 40, said lever having a head 46, located between the sides of the spring to effect the proper shifting of the latter as the said hand-lever is operated in one direction or the other.

Secured upon the forward portions of the upper edges of the parallel members 6 of the supporting-frame are bearing-plates 47 for trunnions 48 at the sides of an operating-rod 49 for the reciprocatory devices on the screwshaft, the lower end of said rod being provided with an arched yoke 50, extending transversely over the screw-shaft, the ends of said yoke being connected to the ends of the arched yoke 34 by means of the curved arms 51. (See Fig. 3.) The portion of the rod 49 above the bearing-plates 47 is provided with a sleeve 52, provided at its upper end with a hollow fitting 53, through which passes a handle 54. Secured to the lower end of said sleeve at 55 is a drum 56, around which is wound the tiller rope 57, which passes around pulleys at the sides of the boat and has the ends thereof connected to the tiller 58, which operates the rudder 59 of the boat. (See dotted lines in Fig. 1.)

The base of each of the springs 44 is bent to form a notch 60, which when the double pawls are carried to horizontal positions is entered by a rib or bead 61 on top of the easing 27, and thus are the pawls held out of operative relation with the ratchet-nuts until thrown into engagement therewith by the operator, as already described. Whenever the said pawls are operated to carry one of the members thereof downwardly to one side or the other of the axis of the screw-shaft 16, as shown in Fig. 4, one of the corners 62 of the springs 44 will ride over the rib or bead 61 and become engaged therewith, thus holding the pawls in looking engagement with the ratchet-nuts, the said pawls thereby preventing the nuts from turning, and the effect of which is to impart revolving motion to the screw-shaft on actuation of the reciprocatory devices.

The parts being constructed and organized as hereinbefore described, it is apparent that by grasping the handle 54 and. turning the same to a position truly transverse of the boat or other vessel the vessel will be caused to take a straight course through the operation of the tiller devices herein described. Whenever it is desired to alter the course, it is simply necessary to partially rotate the sleeve 52 about the operating-rod 49, as is apparent. By carrying one member of each of the pawls 41 into locking engagement with teeth of the ratchetnuts on one side of the axis of the screw-shaft 16 and then pulling the operating-rod 49 rearwardly to the position shown in dotted lines in Fig. 3 the screw-shaft will be caused to revolve in one direction, since the nuts are prevented from turning thereon and will continue to be revolved in the same direction as the operating-rod is again pushed forwardly, this motion being rapidly kept up to revolve the propeller shaft to propel the vessel. The motive power applied to the operating-rodis transmitted to the casing 27, as is apparent, and consequently said casing and the parts mounted thereon, together with the yoke 34 and nuts 21 and 22, are all reciprocated back and forth with the movements of the operating-rod. On each forward stroke of said rod the said casing and the appurtenances thereof referred to are carried rearwardly, the rod 36 accommodating itself to such movement by partially sliding up and down through the oscillatory block 37, as shown. Now by shifting the double pawls so as to carry the other members thereof into engagement with the ratchet-nuts on the other side of the axis of the shaft and continuing the fore-and-aft mo tions of the operating-rod the screw -shaft will be caused to revolve in the reverse direction, as will be readily understood. The principal purpose of the rod 36 is to prevent the casing 27 from turning with the screwshaft, and it will be seen that by causing one of the members of one of the double pawls only to become engaged with one of the.

ratchet-nuts the propulsion of the vessel can be effected by a single motion only of the operating-rod. It will be understood that the bearings 15 and 17 for the ends of the screwshaft are thrust hearings to receive the thrusts of said shaft, and thereby cause the vessel to be propelled in one direction or the other, according to the direction in which the shaft is revolved.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In propulsion devices for marine vessels,

a screw-shaft, thrust-bearings for the ends thereof, a nut on the shaft, having means entering the groove therein, means for preventing rotation of the nut with the shaft, and means for reciprocating said nut on the shaft, said second-named means comprising ratchets on the periphery of the nut and a springcontrolled pawl for engaging the same. 2. In propulsion devices for marine vessels, a screw-shaft, thrust-bearings for the ends thereof, a nut on the shaft, having means entering the groove therein, means for preventing rotation of the nut with the shaft, and means for reciprocating said nut on the shaft, said third-named means comprising a casing having abutting engagement with the nut.

3. In propulsion devices for marine vessels, 2. screw-shaft, thrust bearings for the ends thereof, a nut on the shaft, having means entering the groove therein, means for preventing rotation of the nut with the shaft, and means for reciprocating said nut on the shaft, said third-named means comprising a casing, a yoke, a swinging slidable rod on the yoke, a second yoke connected with the first and a pivoted operating-rod for said second yoke.

4. In propulsion devices for marine vessels, a screw-shaft, thrust-bearings therefor, and means for revolving the shaft in either direc tion, comprising an operating-rod, a rotatable sleeve mounted thereon and carrying a drum at its lower end and a handle at its upper end, and a tiller-rope wound around the drum and leading to and connecting with the tiller of the vessel.

5. In propulsion devices for marine vessels, a truss-frame, a right and left hand screwshaft, thrust-bearings therefor supported by said frame, right and left hand nuts on the shaft, having parts of the same entering the grooves in the shaft, said nuts being provided on their peripheries with ratchets, springcontrolled double pawls for engaging the ratchets of the nuts on either side of the axis of the screw-shaft, and means for reciprocatiplgfsaid nuts and pawls longitudinally of the s a t.

6. In propulsion devices for marine vessels, a right and left hand screw-shaft, thrustbearings therefor, right and left hand nuts on the shaft, having parts of the same entering the grooves in the shaft, a casing upon the shaft carrying means for engaging said nuts,

on either side 'of the axis of the shaft, and means for reciprocating the casing and nuts longitudinally of the shaft, said first-named means comprising double pawls and'springs for controlling the same.

7. In propulsion devices for marine vessels, a right and left hand screw-shaft, thrustbearings therefor, right and left hand nuts on the shaft, having parts of the same entering the grooves in the shaft, a casing upon the shaft carrying means for engaging said nuts, on either side of the axis of the shaft, and means for reciprocating the casing and nuts longitudinally of the shaft, said secondnamed means comprising a yoke and a swinging slidable rod, a second yoke and connections between the two, and a pivoted operating-rod mounted upon said second yoke.

-8. In propulsion devices for marine vessels, a right and left hand screw-shaft, thrustbearings therefor, right and left hand nuts on the shaft, having parts of the same entering the grooves in the shaft, a casing upon the shaft carrying means for engaging said nuts on either side of the axis of the shaft, means for reciprocating the casing and nuts longitudinally of the shaft, and operating-levers for the pawls and springs, said springs being substantially triangular in form and having members the terminals of which engage the under side of the pawls, and said levers having heads located between the sides of the springs.

9. In propulsion devices for marine vessels, a right and left hand screw-shaft, thrustbearings therefor, right and left hand nuts on the shaft, having parts of the same entering the grooves in the shaft, a casing through which the shaft extends having uprights supported thereon, a longitudinal pin having its bearings in said uprights, spring-actuated means mounted on the pin, adapted to be carried into engagement with the nuts, on either side of the axis of the shaft, and means for reciprocating the casing longitudinally of the shaft, said nuts having abutting engagement with the end walls of the casing.

10. In propulsion devices for marine ves sels, a screw-shaft, thrust-bearings therefor, and means for imparting rotary motion thereto in either direction, comprising a pivoted operating-rod, a rotatable sleeve on the upper end of the rod, a handle supported by the sleeve, and steering connections between the sleeve and the tiller of the vessel.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LORENZO D. MALLORY.

Witnesses:

J. N. YOUNG, F. W. STEARNS. 

